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Basic and Diluted Net Income per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share Basic and Diluted [Line Items]                
Net income $ 33.4 $ 41.1 $ 19.5 $ 72.2 $ 54.5 $ 28.5 $ 94.0 $ 155.2
Less: Net income attributable to non-redeemable noncontrolling interests (5.3)     (18.4)     (15.2) (41.6)
Less: Dividends on Preferred Stock and redeemable noncontrolling interests (15.1)     0.0     (24.6) 0.0
Adjustment to net income attributable to common stockholders 0.0     (0.4)     (0.9) (1.1)
Net income attributable to common stockholders - basic 13.0     53.4     53.3 112.5
Reallocation of net income from non-redeemable noncontrolling interests to common stockholders due to effect of dilutive securities 2.8     14.2     9.9 32.1
Net income attributable to common stockholders, diluted 15.8     $ 67.6     63.2 $ 144.6
Net income per share - diluted:                
Common stock, shares subscribed but unissued (in shares)       1,253,470       1,253,470
Class A common stock                
Earnings Per Share Basic and Diluted [Line Items]                
Net income attributable to common stockholders - basic 12.8     $ 52.1     52.2 $ 109.7
Reallocation of net income from non-redeemable noncontrolling interests to common stockholders due to effect of dilutive securities 2.8     14.2     10.0 32.2
Net income attributable to common stockholders, diluted $ 15.6     $ 66.3     $ 62.2 $ 141.9
Denominator:                
Weighted average shares outstanding - basic (in shares) 67,243,324     66,791,329     67,131,538 65,230,377
Weighted average shares of common stock outstanding - diluted (in shares) 89,364,422     89,356,938     89,503,327 89,514,680
Net income per share - basic:                
Net income per share - basic (in dollars per share) $ 0.19     $ 0.78     $ 0.78 $ 1.68
Net income per share - diluted:                
Net income per share - diluted (in dollars per share) $ 0.17     $ 0.74     $ 0.70 $ 1.59
Class A common stock | LLC Interests                
Denominator:                
Effect of dilutive securities (in shares) 19,801,028     21,216,195     19,801,028 22,953,032
Class A common stock | RSUs                
Denominator:                
Effect of dilutive securities (in shares) 1,168,776     1,349,414     1,314,783 1,331,271
Class A common stock | 2025 Convertible Notes                
Denominator:                
Effect of dilutive securities (in shares) 1,151,294     0     1,255,978 0
Class C common stock                
Earnings Per Share Basic and Diluted [Line Items]                
Net income attributable to common stockholders - basic $ 0.2     $ 1.3     $ 1.1 $ 2.8
Reallocation of net income from non-redeemable noncontrolling interests to common stockholders due to effect of dilutive securities 0.0     0.0     (0.1) (0.1)
Net income attributable to common stockholders, diluted $ 0.2     $ 1.3     $ 1.0 $ 2.7
Denominator:                
Weighted average shares outstanding - basic (in shares) 1,318,499     1,659,314     1,371,660 1,681,264
Weighted average shares of common stock outstanding - diluted (in shares) 1,318,499     1,659,314     1,371,660 1,681,264
Net income per share - basic:                
Net income per share - basic (in dollars per share) $ 0.19     $ 0.78     $ 0.78 $ 1.68
Net income per share - diluted:                
Net income per share - diluted (in dollars per share) $ 0.17     $ 0.74     $ 0.70 $ 1.59